Carbtjrjetoh



Patented Sept. 12, 1939 UNITED STATES PATENT OFFICE UAEBURETOR Alexander R. J. Hilson, Hamilton,

Ontario, and

Application September 22, 1937, Serial No. 165,054

3 Claims.

This invention relates to carburetors, an object f the invention being to provide a carburetor in which gasoline or other fuel oil is brought to the point of vaporization by the heat of the exhaust from the engine and is caused to commingle with air in the intake passage, which passage is also heated by the exhaust from the engine so the air and fuel mix while in a heated condition to secure an efficient fuel mixture.

The invention embodies many novel features of construction and combinations and arrangements of parts, all of which will be more fully hereinafter described and pointed out in the claims.

In the accompanying drawing- Fig. l is a view in longitudinal section illustrating our improved carburetor;

Fig. 2 is a view in transverse section on the line.

2-2 of Fig. 1;

Fig; 3 is a View in transverse section on the lines 3 3 of Fig. 1;

Fig. 4 is a top plan View of the carburetor on a somewhat reduced scale.

I0 represents the casing of our improved carburetor which constitutes a chamber through which the exhaust gases from the engine are directed, and hence the chamber is formed with an inlet II and an outlet I2 for the exhaust gases.

The casing Ii! may of course be of any shape desired but is shown in general cylindrical form having an open top which is closed by a cap plate I3 secured thereon, and between the cap plate I3 and the upper end of the casing I0 a disk Ill is secured preferably by means of screws I5. This disk I4 constitutes an integral part of a sleeve IS which lits into an outlet nipple I 'I' which is adapted to be secured to the intake manifold of an engine (not shown) so that said sleeve and nipple constitute in eieot a part of the air intake manifold, and in view of the fact that said sleeve I5 is in contact with the exhaust gases it is heated thereby and the heat transferred to the air in the passage.

A circular series of tubular vaporizing chambers I'I (Fig. 2) constitute integral parts of the disk I 4 and sleeve I 5 and are preferably arranged in circular series around the: sleeve I6 and parallel to the axis thereof. In these tubular vaporizing chambers Il we locate cores I8 having spiral grooves i9 around the same for the passage of gasoline or other fuel oil, so that in said passage the gasoline is heated and escapes through ports 20 of the lower ends of the vaporizing chambers, which ports communicate with (ci. Lis-107) the sleeve i6 so as to direct the vapor into the sleeve. The lower'ends of the cores I8 are preferably reduced in diameter as shown at 2l so as to aiord ample space for the movement of the fuel Vapor.

The cap plate I3 above referred to is formed with an annular gasoline inlet chamber 22 which communicates with the upper ends' of the Vaporizing chambers Il, and we have illustrated a supply pipe 23 communicating with this chamber 22 for supplying gasoline preferably under pressure to the carburetor.

A disk 24 is secured to the cap plate I3 and said cap plate under the disk 24 is formed with a circular chamber 21 receiving the enlarged upper end 28 of a tubular valve 29 which fits Within the sleeve I6 and is adapted to turn therein. This tubular valve 29 is provided with ports 3B to register with the vapor outlet ports 29 so that by turning the valve the size of said outlets can be varied or can be shut 01T altogether.

Air inlet ports 3| are provided in the disk 24 which normally register with ports 32 in the end of the valve 29 so that it will be noted that by turning this valve 29 the admission of both air and vapor is controlled. As a means for turning the valve we have shown the same as having a stud 33 on its upper end extending through the disk 24 and provi-ded with a lever 34 which when manually operated will cause the valve to turn.

It will of course be understood that we may employ any means for turning the valve and that we may vary the details of construction set forth as we do not limit ourselves to specic details but consider ourselves at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

We claim:

l. A carburetor including a casing open at the top end and having the lower end constricted into a central tubular downwardly extending projection, a sleeve arranged centrally within said casing, said sleeve being open at both ends with one ond projecting into said tubular projection and with the other end merging into a flange closing the open top of said casing, said Harige being formed with a plurality of tubular vaporizing chambers positioned parallel with the axis of said sleeve and extending from the flange to near the bottom of the sleeve, each of said chambers having a vapor outlet port positioned to discharge into said sleeve near the lower end thereof, a core iilling each of said chambers, each of said cores having in its o-uter surface a spirally arranged groove small compared with the diameter of the core and extending from the top to the bottom of the core for causing liquid fuel to travel in a circuitous path from the top of the chamber to the outlet thereof, a disk covering the upper end of said casing formed with an annular fuel distributing groove continually open to said vapor chambers for supplying all of said chambers with liquid fuel simultaneously, said disk being also formed with a plurality of air inlet ports, a tubular valve member rotatably mounted in said sleeve and extending from a point slightly above the top of the sleeve to a point near the bottom thereof, said sleeve having air inlet ports at the top and vapor inlet ports near the bottom, the respective ports being positioned so that they will all register at the same time, means for simultaneously heating the fuel and air to substantially the same temperature, said heated fuel entering the heated air adjacent the bottom of said tubular valve member with the fuel moving into the air at a right angle to the flow of the and manually actuated means for giving a desired turning movement to said valve member for varying the opening of said ports simultaneously.

2. A carburetor including a tubular casing having an inlet in one side intermediate the ends, an outlet positioned in the opposite side, a closed button end having a passageway and an open top end, a cap plate for closing said open top end, said cap plate having an annular fuel inlet chamber open on its lower side, a fuel inlet port merging into said fuel chamber and an air inlet opening arranged centrally thereof, a valve having one end positioned in said inlet opening for controlling the passage of air, said valve having a tubular portion extending downwardly to the passageway in said bottom end, a sleeve surrounding said tubular portion and extending from said cap plate to a position within said passageway in said bottom end, a plurality of tubular vaporizing chambers open at the top arranged in a circle in said casing spaced from said sleeve, means at the bottom of each of said vaporizing chambers forming a passageway between the interior of the respective vaporizing chambers and the interior of said tubular portion, said vaporizing chambers being arranged with their axes parallel to the axis of said sleeve and with their open tops continually in free communication with said annular fuel inlet chamber and a solid core for each of said vaporizing chambers extending from the top to the bottom thereof and nlling the chamber, each of said cores having a spiral groove extending from the top to the bottom thereof.

3. A carburetor including a casing having an open top end and a closed bottom end having a passageway therein, a tubular sleeve arranged centrally in said casing and extending from a position in said passageway to said open top end, said sleeve having a plurality of radiating openings adjacent the bottom end, a vaporizing chamber in said casing for` each of said radiating openings, means forming a passageway from the bottom of the respective vaporizing chambers to the respective radiating openings, a cap plate for closing the open top end of said casing, said cap plate having a fuel passageway for continually diverting fluid fuel to said vaporizing chambers and a central opening in line with said sleeve, a valve plate secured to said cap plate, said valve plate having a number of apertures arranged in a'circle above the bore of said sleeve, a tubular rotatable valve member positioned in said sleeve and extending from said valve plate to the passageway in said closed bottom end, said valve member' being open at the bottom and formed with inlet ports arranged in the same plane as the passageways between said Vaporizing chambers and the interior of said sleeve whereby when said valve member is in a given position said inlet ports in the valve member will register with the passageways extending from the vaporizing chambers to said sleeve, said valve member having a closed tcp end having a plurality of apertures therein arranged in a circle and positioned to register with the apertures in said valve plate when the inlet ports of the valve member are registering with the passageways leading from said vaporizing chambers, and a core arranged in each of said vaporizing chamera'each of said cores having a spiral groove therein extending from the top to the bottom, the ports in said valve member varying the inlet of fuel as the air passing from said valve plate varies with the turning of the valve member.

ALEXANDER R. J. HILsoN. FREDERICK E. sHNER. 

